Imagine walking through a tropical rainforest. you notice that there are different types of trees, birds, insects, and other organisms. a few weeks later you are taking a walk through the desert and notice that the trees, birds, insects, and other organisms are different than those you saw in the rainforest. which of the following statements best explains the differences between each of these ecological systems? a. organisms in each ecological system have short dispersal distances and are confined to the area where they mate.
b. organisms in each ecological system have evolved in that system and have adaptations suited for that environment.
c. organisms in each ecological system haven't had enough time to evolve the adaptations for the other ecosystem; with enough time they will evolve into the other ecological system.
d. organisms in each ecological system are there by chance and their presence in different ecological systems does not have a biological explanation.

b. Organisms in each ecological system have evolved in that system and have adaptations suited for that environment.

Explanation:

The abiotic factors of one ecosystem differ from that of the other. A forest ecosystem mostly has enough of rainfall, suitable temperatures, soil fertility and availability of nutrients to support the growth of numerous life forms. On the other hand, a desert ecosystem is characterized by water scarcity, extremes of temperatures, infertile soil, and other unfavorable abiotic conditions that allow only certain plant and animal species to survive there.

Therefore, life forms are adapted to the surroundings and two ecosystems with different abiotic conditions will have different species of plants and animals.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex